Josh Long's research concentrates on experimental tests of particle physics at low energies. One experiment, under construction at the Oak Ridge National Laboratory, is a new search for a permanent electric dipole moment of the neutron (nEDM). An nEDM signal would be an example of time reversal symmetry violation and a key to understanding the matter-antimatter asymmetry in the universe. Another experiment, based at the Indiana University Cyclotron Facility, is a test of the Newtonian inverse square law (ISL) at distance ranges less than 100 microns. Modifications to the ISL at short range, arising from new elementary particles or even extra spacetime dimensions, are predicted from many models that attempt to describe gravity and the other fundamental interactions in the same theoretical framework.